I have this project to do about crosses and I can't think of what the answer is for the following questions: What is the area rule of the crosses (the table below will help you)?
I also need to know what the formula is for it?
Please help me
I wish I could see a diagram I don't know where the numbers come from and what the cross looks like. I approached this with differences.
If I have 3 consecutive terms in the first row
then the two numbers in the row directly below these 3 are
Taking differences a second time, the number below these 2 in the third row is
But all the numbers in the third row are 4 and henve
Thus if you know the first two terms are a1 = 5 and a2 = 13 you can generate the rest. For example
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